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simple error but i dont know

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whiyan
whiyan on 23 Oct 2020
Edited: Walter Roberson on 23 Oct 2020
The above graph is the purpose that i want.
The below is the code and it has errors. Whats the problem? Please suggest the code. Thanks
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W=40;
Vth=0.45;
Leff=0.15;
k=4.255*(10^-4)*(W/Leff);
lambda=25*10^-5;
Vgs=linspace(0,2);
vds=[0.2 1 2];
m=length(Vgs);
for k1 = 1:numel(vgs)
for i=1:m
if vgs(k1) < Vth
current(k1,i)=0;
elseif Vds(i) >= (vgs(k1) - Vth)
current(k1,i)=0.5* k * ((vgs(k1) - Vth).^2);
elseif Vds(i) < (vgs(k1) - Vth)
current(k1,i)= k*((vgs(k1)-Vth)*Vds(i) - 0.5*(Vds(i).^2));
end
end
end
figure
plot(Vgs,current, 'LineWidth',1.5)
------------------------------------------------------------------------------------------------------------------------
error: 'current' undefined near line 1, column 1
error: 'vgs' undefined near line 1, column 1

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Answers (1)

Andy
Andy on 23 Oct 2020
You have set Vgs with linspace but then refer to vgs in the code. This is possibly creating both errors as the current is calculated from 'vgs'

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